Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Tatsuya Sugita0
Masaya Adachi0
Shoichi Hirota0
Takanobu Hori0
Akira Kato0
Hiroshi Kajiyama0
Isao Tokomoto0
Katsumi Kondo0
...
Date of Patent
November 7, 2006
0Patent Application Number
102511680
Date Filed
September 20, 2002
0Patent Primary Examiner
Patent abstract
Disclosed is an optical system that has superior optical characteristic and wear resistance and can be formed at low temperatures. An optical system 101 for adjusting visible light transmittance to have a desired value comprises fluoride 103, and at least part of the optical system has a crystal grain diameter of 3 nm to 10 nm. The fluoride 103 has a specific surface area of 1 m2/g to 5 m2/g.
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